class StreamConsumer(object):
def __init__(self, app_access_token, stream_name, stream_conf):
self.app_access_token = app_access_token
self.stream_name = stream_name
self.stream_conf = stream_conf
self.adn_client = AdnClient(access_token=app_access_token)
def start(self):
response = self.adn_client.streams(params={'key': self.stream_name})
if not response['data']: # If we don't have any streams make one
logger.info('Creating a stream object: %s', self.stream_conf)
response = self.adn_client.streams(method="POST", params=json.dumps(self.stream_conf))
stream_endpoint = response['data']['endpoint']
else:
stream_endpoint = response['data'][0]['endpoint']
logger.info("Starting to fetch stream: %s", stream_endpoint)
while True:
r = requests.get(stream_endpoint, stream=True, timeout=600)
if r.ok:
for line in r.iter_lines(chunk_size=1):
if not line:
continue
blob = json.loads(line)
if not blob.get('data'):
continue
is_delete = blob['meta'].get('is_deleted')
message_type = blob['meta'].get('type')
method_name = 'on_%s' % (message_type,)
func = getattr(self, method_name, self.on_fallback)
func(blob['data'], blob['meta'], is_delete)
else:
logger.warning('Failed to connect to stream endpoint')
logger.warning("Waiting one second before retrying")
time.sleep(1)
def on_fallback(self, data, meta, is_delete):
logger.info('Fallback blob processor Message Type: %s Timestamp: %s', meta['type'], meta['timestamp'])
def __init__(self, app_access_token, stream_name, stream_conf):
self.app_access_token = app_access_token
self.stream_name = stream_name
self.stream_conf = stream_conf
self.adn_client = AdnClient(access_token=app_access_token)
